Detachable pneumatic tire.



35 being shown in section. Fig. 2 is a similar To-ll whom' it may concern,.-

' is a specification.

UNITED STATES PATENT OFFICE.

CHAR-LES `s. scorrgor cADi'Z, Onio.l

DETAGHABLE PNEuMATldTmE.' j

shall be automatically detachable upony deflation ofthe tire, and thisin the simplest possible manner and without any unnecessary, manipulation; which shall be easy of manufacture, and more especially with the existing tools and appliances of rubber-factories, and which shall be free from the chafingwhich is common in other types ofvtires by reason of the relative motion between the tire-shoe and the adjacent and contacting rigid'parts,' To this end my inventioncomprises-a tireshoe'having an inextensible selVage,l a flexible bolster having a side flange cooperating with and holding the endless selvage in place, 4and a supporting piece or ring which lies beneath the bolster when the tire is inflated, andv thus. holds the'bolster-flange in position to restrain a lateral displacement of the shoe-selvage, and which when the tire is deflated may be readily removed to permit the vbolster to flex downwardly, and thereby'remove the bolsterflange from restraining proximity to the shoeselvage.

In the drawings, Figure 1 is a perspective View of a portion of a wheel-rim carrying my tire when inflated and attached, the end view when the tire is defiated and detached,

y'and Fig. 3 is a Adetail of Wire tape which I may employ.

In the drawings I have shown as one type of tire embodying my invention a wheel having a common type of spokes A and Wood felly A, shrunk upon Which'is' a plain annular wheel-rim B. In the present embodiment of my invention I have shown this rim 'B as extending but part way across'the felly, so as to leave a cut-away portion or groove b on the. side of the felly not covered by the rim B.

Into this cut-away portion b fits a supportingpiece in the shape of a ringB.

The bolster, which I generally build of canvas and rubber, is composed of a flexible base C and side flanges C', having a rubber filling C2. While these, side flanges must possess the rigidity necessary to withstand the outward pressure of the inflated tire, they Specification of' Letters Patent.

. 'l l i Application filed October 30, 105. Serial No. 285,059.

shown t 'ou-ter shoe, as in double-tube tires, it is well` Patented cenas, 190e.

are. preferably vof a sufficiently-yielding character to cause a soft fit between their inner faces and the outer faces of the tire-shoe.

Thetire-shoe D is of the u sual construc- 5o ltion andis supplied with inextensible sQlvages D', which ma be made by incorporating therein a ringo wire or several convolutions of the Wire braid or tape F. (Shownin Fig. 3.) Theinner tubeEhasthe usual valve 65 for inflation, whichl I have considered it unnecessary to illustrate, and although'I have e inner tube as separate frorn'the' understood that these parts may be per- 7 6 manently secured, as in single-tube tires.

The operation 4of my invention .will be clear at a, lance. When the inner 'tube has been attac edl and inflated, the inextensible selvages of the tire-shoe pressv against, the 75 -side flanges 'of the'b'olster, causing these t i. bend outwardlyto the limit of their stretc L and to rock `up'on their point of contact with the wheel-rirnv as .a fulcrum.` This brings `into play a fbrce which acts radiallflinward 80" toward the wheel center, and thus volds `the supporting-piece place. So: long' as the inner tube remains inflated the parts maintain the positions shown in Fig, 1. What is more, the close and soft fitbetween the outer 8 5 faces of the tire-shoe, which is lcomposed of canvas and rubber, and the inner faces of thev side flanges of the bolster, which may be built of the same materials, prevents any chafing of the parts which is now such apro-1 9o lific source of. wear and of tire destruction.

When ,it is sought to detach the tire, 'theinner tube is deflated. This removes the radially-inward pressure against the support- 'ing-piece B', and a kick orblow against-the 9 5' Awheel is sufficient to dislodge the supportingring from its place inthe cut-away portion whereupon the-bolster may be flexed down- Wardl sufficiently to Ypermit'the instant re- -j It Ais manifest that a constructionv of a Wheel-rim suitable for my 'tire may he at-x tained in many ways which differ from thatu shown herein by wa of example.' Atthe same time it is to be o served that the conreg.; struction shown the rim B extends part way across the face of the felly, and the juxta posed removable filling-piece B of itself completes the wheel-rim. Furthermore, it is to be es ecially noted that in the'illustrated 1ro constructlon theV supportin -piece and the flanges of the bolster extend aterally beyond the face of the telly. When, then, the, supporting-piece has been removed, thevbolster can flex downwardly toward the Wheel center by a distance much greater than the depth oi the cut-away portion b.

It is also evident that it is unnecessary to make the supporting-piece as a complete ring, since a segment of a ring extending part `Way round the circumference willy when removed permit the bolster-flange to flex downwardly for a sufiicient extent, measured angularly around the Wheel, to remove the tireshoe. Since the tire need only' be removed from one side,- it is clear that the side of the bolster opposite thereto may be permanently attached to the Wheel-rim B. On the other hand, both the parts B and B might be removable.

l may state in conclusion that there is no part of this tire which may not readily be manufactured in' a rubber Works. The rim and supportingpiece B are capable of be ing rolled bythe simplest tools. The flexible bolster may be built up of rubber and canvas and 'vulcanized ona form in a manner which will be obvious to any rubber manufacturer. lt follows that any rubber-factory can build all the parts of my tire.

l clailni l. A Wheel-rim provided with a flexible bolster having a side flange, and a removable ipintingpiece beneath the bolster, sub ...ntialiy as described.

f2. A detachable and inflatable pneumatic 3.5 tire comprising a tire-shoe having an inextensible selvage, a llexible bolster havinga side flange cooperating therewith, and a remov able supporting-piece beneath thev bolster, substantially as described.

3. A detachable and inflatable pneumatic tire comprising a tire-shoe having an inexten sible salvage built up of wire tape, a flexible bolster having a side `flange coperating therewith, and a removable supporting-piece beneath the bolster, substantially as described.

4. A Wheel-rim having a flexible bolster With a side flange, and a removable supportingpiece lying 1n a cut-away portion of the Wheel-rim beneath the bolster, substantially as described.

5. A detachable, inflatable pneumatic tire comprising a telly having an annular rim extending part Way across its face, a juxta posed re movable Asupporting-piece yextending beyond the rim-face, and a flexible bolster having a side flange lying over the supporting-piece, substantial as described.

6. A detachable in atable pneumatic tire com rising a telly having an annular rim extending part way across its face, a juxtae posed removable supporting-piece extending beyond. the rim-face, a flexible bolster having a side flange lying over the supportingiieoc, and a tire-shoe having an inextensib e selva e cooperating with the flange, substantia ly as described.

In testimony whereof I have signed niy name to this specification in the presence of two subscribing Witnesses. I

(3l-IAS. S. SCOTT.

Viitnesses ELMER DQWNARD, VANA Moi Ai-AN. 

